We would like to set up voice conferences without human interaction (expect for the conference attendees dialing in) by having the US employees (multiple, up to 10) dial the VoIP provider phone number that terminates at Elastix* and the German employees using the local Asterix setup or dialing the local German phone number that terminates at Asterix.

Is that complex to set up? Is there a good tutorial/explanation available that takes us through the setup? Any specific chapters in
'Elastix without Tears'? Specifically, it would be great if Elastix or Asterix (depending on the location of the caller) could be instructed remotely (by using a key combination after dialing the VoIP provider number) to dial somebody that needs to be placed in the conference.